The City of Yuma, Arizona Agua Viva Water Treatment Facility (WTF) will utilize membrane
filtration and is scheduled to be operational February of 2009. The Used Water Recovery
System (UWRS) and Chemical Neutralization System (CNS) at the WTF will recover used
water, dewater solids, and neutralize spent membrane chemical cleaning wastes. Key
components of the UWRS and CNS include the following:
the design of the UWRS resulted in a process treatment train of flow equalization
(circular concrete basin), chemical addition (coagulant aid/dewatering polymers),
clarification (dissolved air flotation), and solids dewatering (solar drying beds), and the
recovered water will be returned to the head of the plant while the dewatered residuals
will be disposed of offsite;
the used water entering the UWRS will consist of backwash from the self-cleaning
strainers, "deconcentration" flows from the membrane basins, process basin
drainage/overflows, and decant from the solar drying beds;
the unique unit process in the UWRS is the use of dissolved air flotation (DAF) for the
clarification process; the CNS consists of two rectangular concrete tanks, drain/recirculation pumps and
sodium hydroxide/sodium bisulfite chemical feed systems; and, the dual tank design in the CNS will allow the operator to neutralize two different
batches/types of spent membrane chemical cleaning wastes. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 870 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 11/01/2009 |
